The problem with most of the tracks you mention is that fact they were released on the box set, and they wanted that to be the only place to get them, so adding them to the albums was a no no.

I decided to axe the box set, thus making it a highly sought-after rarity and earning me the eternal wrath of the marketing department.

In reply to:

Now what I would do is to scrap the crappy latter-day re-recordings (read: LBIA) and go for more unreleased original songs. But that's obvious, I guess.

That's the only one worth listning to. The remixes of Sound And Vision and Joe The Lion are indeed worthless as they have very little new to offer but Look Back In Anger is a proper rerecording which offers a new interpretation. I bet you're just saying that because Reeves called you "four-eyes".